Serpentine belt diagram
 

2000 Discovery was making some bad squeaking noises when I accelerated at slow speed. Serpentine belt is very cracked so I will get a new one tomorrow. Removed two pulleys that looks a little warped but I'm trying to find a diagram so I know what parts I need to buy. Both have part number Koyo 6203RR9D stampled on them. One is smaller and smooth and one is larger with grooves. Anyone have a diagram so I can tell the parts store what I need? From looking online that part number is a tensioner pulley but the fact that both parts have the same number is confusing to me. Thanks